From: Hannes Reinecke Date: Wed, 5 Nov 2014 12:08:21 +0000 (+0100) Subject: libata: Implement ATA_DEV_ZAC X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9162c6579bf90b3f5ddb7e3a6c6fa946c1b4cbeb;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git libata: Implement ATA_DEV_ZAC Add new ATA device type for ZAC devices. Acked-by: Christoph Hellwig Acked-by: Tejun Heo Signed-off-by: Hannes Reinecke Signed-off-by: Tejun Heo --- diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index c5ba15af87d3..5c84fb5c3372 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1043,8 +1043,8 @@ const char *sata_spd_string(unsigned int spd) * None. * * RETURNS: - * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or - * %ATA_DEV_UNKNOWN the event of failure. + * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, + * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. */ unsigned int ata_dev_classify(const struct ata_taskfile *tf) { @@ -1089,6 +1089,11 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf) return ATA_DEV_SEMB; } + if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) { + DPRINTK("found ZAC device by sig\n"); + return ATA_DEV_ZAC; + } + DPRINTK("unknown device\n"); return ATA_DEV_UNKNOWN; } @@ -1329,7 +1334,7 @@ static int ata_hpa_resize(struct ata_device *dev) int rc; /* do we need to do it? */ - if (dev->class != ATA_DEV_ATA || + if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) || !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) return 0; @@ -1889,6 +1894,7 @@ retry: case ATA_DEV_SEMB: class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ case ATA_DEV_ATA: + case ATA_DEV_ZAC: tf.command = ATA_CMD_ID_ATA; break; case ATA_DEV_ATAPI: @@ -1980,7 +1986,7 @@ retry: rc = -EINVAL; reason = "device reports invalid type"; - if (class == ATA_DEV_ATA) { + if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) { if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) goto err_out; if (ap->host->flags & ATA_HOST_IGNORE_ATA && @@ -2015,7 +2021,8 @@ retry: goto retry; } - if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { + if ((flags & ATA_READID_POSTRESET) && + (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) { /* * The exact sequence expected by certain pre-ATA4 drives is: * SRST RESET @@ -2280,7 +2287,7 @@ int ata_dev_configure(struct ata_device *dev) sizeof(modelbuf)); /* ATA-specific feature tests */ - if (dev->class == ATA_DEV_ATA) { + if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { if (ata_id_is_cfa(id)) { /* CPRM may make this media unusable */ if (id[ATA_ID_CFA_KEY_MGMT] & 1) @@ -4033,6 +4040,7 @@ int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, if (ata_class_enabled(new_class) && new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI && + new_class != ATA_DEV_ZAC && new_class != ATA_DEV_SEMB) { ata_dev_info(dev, "class mismatch %u != %u\n", dev->class, new_class); diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index dad83df555c4..3dbec8954c86 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -1809,6 +1809,7 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, switch (qc->dev->class) { case ATA_DEV_ATA: + case ATA_DEV_ZAC: if (err & ATA_ICRC) qc->err_mask |= AC_ERR_ATA_BUS; if (err & (ATA_UNC | ATA_AMNF)) @@ -3792,7 +3793,8 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, struct ata_eh_context *ehc = &link->eh_context; unsigned long tmp; - if (dev->class != ATA_DEV_ATA) + if (dev->class != ATA_DEV_ATA && + dev->class != ATA_DEV_ZAC) continue; if (!(ehc->i.dev_action[dev->devno] & ATA_EH_PARK)) @@ -3873,7 +3875,8 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, /* retry flush if necessary */ ata_for_each_dev(dev, link, ALL) { - if (dev->class != ATA_DEV_ATA) + if (dev->class != ATA_DEV_ATA && + dev->class != ATA_DEV_ZAC) continue; rc = ata_eh_maybe_retry_flush(dev); if (rc) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 0586f66d70fa..bea6e7f4ebf0 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -235,7 +235,8 @@ static ssize_t ata_scsi_park_store(struct device *device, rc = -ENODEV; goto unlock; } - if (dev->class != ATA_DEV_ATA) { + if (dev->class != ATA_DEV_ATA && + dev->class != ATA_DEV_ZAC) { rc = -EOPNOTSUPP; goto unlock; } @@ -3412,7 +3413,7 @@ static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, ata_xlat_func_t xlat_func; int rc = 0; - if (dev->class == ATA_DEV_ATA) { + if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) goto bad_cdb_len; diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c index e37413228228..3227b7c8a05f 100644 --- a/drivers/ata/libata-transport.c +++ b/drivers/ata/libata-transport.c @@ -143,6 +143,7 @@ static struct { { ATA_DEV_PMP_UNSUP, "pmp" }, { ATA_DEV_SEMB, "semb" }, { ATA_DEV_SEMB_UNSUP, "semb" }, + { ATA_DEV_ZAC, "zac" }, { ATA_DEV_NONE, "none" } }; ata_bitfield_name_search(class, ata_class_names) diff --git a/include/linux/libata.h b/include/linux/libata.h index bd5fefeaf548..a26daea7f5eb 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -191,7 +191,8 @@ enum { ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ ATA_DEV_SEMB = 7, /* SEMB */ ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ - ATA_DEV_NONE = 9, /* no device */ + ATA_DEV_ZAC = 9, /* ZAC device */ + ATA_DEV_NONE = 10, /* no device */ /* struct ata_link flags */ ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ @@ -1491,7 +1492,8 @@ static inline unsigned int ata_tag_internal(unsigned int tag) static inline unsigned int ata_class_enabled(unsigned int class) { return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || - class == ATA_DEV_PMP || class == ATA_DEV_SEMB; + class == ATA_DEV_PMP || class == ATA_DEV_SEMB || + class == ATA_DEV_ZAC; } static inline unsigned int ata_class_disabled(unsigned int class)